Improvement in sickle-grinders



I. J. HUBBELL Sickle-Grinder No. 214,145. Patented April 8, 1879.

T 0 lb n e V l UNITED STATES PATENT OFFICE.

THOMAS J. HUBBELL, OF YOUNTVILLE, ASSIGNOR OF ONE-HALF HIS RIGHT TO JOHNBATEMAN, OF OAKVILLE, CALIFORNIA.

IMPROVEMENT lN SICKLE-GRINDERS.

Specification forming part of Letters Patent No. 214, 145, dated April8, 1879; application filed February 26, 1878.

To all whom it may concern:

Be it known that I, THOMAS J. HUBBELL, of Yountville, county of Napa,and State of California, have invented a Sickle- Holder; and I do herebydeclare the following to be a full, clear, and exact descriptionthereof, reference being had to the accompanying drawmg.

My invention relates to devices which are designed to hold and supportthe sickles of mowing-machines, reapers, headers, &c., for the purposeof grinding them, and so that they may always be ground with a truebevel and at any desired angle.

It consists of an adjustable supportingstandard, which is secured in theproper position near the stone, so that the knives may be brought to theproper bevel, in combination with a shaft-bearing, supporting-plates,and a clamping-lever to hold the blades, as hereinafter more fullydescribed and claimed.

The accompanying drawing is a view of my support and holder.

A represents a base, which is suitably secured opposite the face of thestone. This base is slotted, as shown, and the central connecting-bar Bof the two vertical arms 0 is secured to the base bya bolt passingthrough the slot. By means of this slot and bolt the device may beadjusted to or from the stone, so that the sickle can be held at anyangle with the stone that may be desired, and it also serves to adjustthe position of the sickle to suit large or small grinding-stones.

To the upper ends of the arms 0 are attached short arms D by bolts E,which permit them to be adjusted up or down, as may be desired. Theouter ends of these arms are provided with eyes F, through which the barG slides and turns loosely. This bar has supporting and steadying lugs-H for the sickle, as shown. Near the center are two arms, 1, whichextend across the bar and support the central portion of the sickle. Ateach of their outer ends a hole, K, is made, and a short lever, L, hasits outer end'so bent that it can be inserted into either of the holes.The main portion of this lever then lies along the arm I, above thesickle, and thus steadies and holds the sickle in place while it isbeing ground.

The operation will then be as follows: The frame B O is turned to anangle and secured by the bolt passing through the slot, so that one sideof each tooth in the sickle can be brought upon the stonesuccessivelyand at the proper angle. The sickle is laid upon the lugs Hand arms I, and is held and guided by the lever L. The bar G is made toslide through the eyes F, so as to bring the first tooth into positionto allow one side to be ground. This being finished,it is moved alongand the next tooth is ground.

The space between the supports 0 may be suflicient to allow the bar G tomove far enough to grind a certain numbersay, threeteeth, when it may bedrawn back and the sickle moved along for the next section of three ormore, until the teeth all have one side ground. The frame B O is thenturned upon its bolt and secured at a similar angle, the opposite sideof a line drawn parallel with the face of the stone, and the lever Lshifted to the other arm I, to hold the sickle while the other sides ofthe teeth are ground.

It will be manifest that the angle and bevel of the teeth can always beadjusted by moving the frame B 0 toward or back from the face of thestone, so as to change the angle at which the teeth lie upon the stone,and this also provides for an adjustment for large or small stones.

If the face of the stone be untrue or it be out of center, the boltswhich secure the short arms D D to the standards 0 may be loosened, andthese arms may be changed relatively to each other; or both may be leftloose to accommodate the unevenness of motion; or one maybe made fast,while the other moves.

By these means the most perfect adjustment may be made to accommodatethe sickle to all the variations in grinding-stones, while the angle andbevel can always be perfectly retained by the most unskilled grinder.

It will also be seen that the sickle is supholding-lever L and the arms0 D, substanported throughout its length, and the grindtially as and forthe purpose herein described. ing can be accomplished by one man. Inwitness whereof I have hereunto setmy Having thus described myinvention, what hand and seal. I claim as new, and desire to secure byLetters Patent, is-

The sliding bar G, with its supporting-lugs H and the arms I, incombination with the THOMAS J. HUBBELL. [1,. s.] \Vitnesses G120. H.STRONG, II. B. MCCORMICK.

